<form action='manage.php' method='POST'>
      <input type='submit' class='button' value='Accept'>
      <input type='hidden' name='task' value='accept'>
      <input type='hidden' name='gid' value='12'>
      <input type='submit' class='button' value='Reject'>
      <input type='hidden' name='task2' value='reject'>
</form>